When Sir Paul McCartney headlined at the Glastonbury Music Festivel in Somerset, England on Saturday 25 June 2022, he had two special guests to accompany him - Bruce Springsteen and Dave Grohl from the US band The Foo Fighters, the latter being well-known for being an ABBA fan.   For the encore, Dave Grohl returned to the stage with Bruce and Sir Paul and he was wearing an ABBA hoodie!

A couple of days later, the ABBA Voyage Instagram page posted a video of Benny playing The Foo Fighters' Learn To Fly on the piano, then opening up his shirt to reveal a Foo Fighters T-shirt in a display of mutual appreciation with the caption 🙌 #DaveGrohl @foofighters 💜.

Thanks to Ian Cole.